Is CVE-2021-29975 in the CISA KEV catalog?

No. CVE-2021-29975 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-29975?

CVE-2021-29975 has a CVSS v3 base score of 6.5 (MEDIUM).

What is the EPSS score for CVE-2021-29975?

CVE-2021-29975 has an EPSS score of 0.97% (57th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-29975?

Upgrade firefox on debian unstable to 90.0-1 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2021-29975

MEDIUM

6.5

CVSS v3

NVD

Description

Through a series of DOM manipulations, a message, over which the attacker had control of the text but not HTML or formatting, could be overlaid on top of another domain (with the new domain correctly shown in the address bar) resulting in possible user confusion. This vulnerability affects Firefox < 90.

How to fix

Remediation Available

firefoxDebian

Fixed in:90.0-1CVE-2021-29975

firefoxUbuntu

Fixed in:90.0+build1-0ubuntu0.18.04.1USN-5011-1

Fixed in:90.0+build1-0ubuntu0.20.04.1USN-5011-1

DeveloperEditionWindows application

Affected:90.0Fixed in:90.0Mozilla

Mozilla Firefox (en-US)Windows application

Affected:90.0Fixed in:90.0Mozilla

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Exploit Intelligence

0.97%probability of exploitation in 30 days

57thpercentile

Moderate risk: more likely to be exploited than 57% of all known CVEs.

References

Exploit1

bugzilla.mozilla.org

Vendor Advisory1

mozilla.org

Third-Party Advisory1

security.gentoo.org

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.